.panel {
    .panel__header {
        display: flex;
        flex-flow: row nowrap;
        color: color("gray-darken-2");
        cursor: pointer;
        .header__title {
            flex: 1;
            padding: 10px;
            margin: 0;
            text-transform: uppercase;
            font-weight: 500;
            overflow: hidden;
            text-overflow: ellipsis;
        }
    }
    .panel__body {
        display: block;
        overflow: hidden;
    }
    &.panel-collapsible {
        padding: 5px 0;
        .panel__header {
            position: relative;
            &:hover {
                color: theme-color("primary");
            }
            &::after {
                content: "\e5ce";
                position: absolute;
                font-family: "materialicon";
                font-size: 20px;
                color: inherit;
                right: 10px;
                top: 50%;
                transform: translateY(-50%);
            }
        }
        &.panel-collapsible--collapsed {
            .panel__header::after {
                content: "\e5cf";
            }
        }
    }
}